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Volume 16, Number 11—November 2010

Letter

Two Clusters of HIV-1 Infection, Rural Idaho, USA, 2008

Randall J. NettComments to Author , Jared L. Bartschi, Giovanina M. Ellis, David M. Hachey, and Lisa M. Frenkel
Author affiliations: Centers for Disease Control and Prevention, Atlanta, Georgia, USA (R.J. Nett, K.K. Carter); Idaho Department of Health and Welfare, Boise, Idaho, USA (R.J. Nett, J.L. Bartschi, J.C. Roscoe, K.K. Carter, C.G. Hahn); Seattle Children’s Hospital Research Institute, Seattle, Washington, USA (G.M. Ellis, L.M. Frenkel); Idaho State University, Pocatello, Idaho, USA (D.M. Hachey); University of Washington, Seattle (L.M. Frenkel); Family Medicine Residency of Idaho, Boise (J.C. Roscoe)

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Table

Sex and risk factors among patients epidemiologically linked to 2 clusters of 
HIV-1, southeastern Idaho, USA, 2008*

Case ID Sex Risk factors Cluster† Phylogenetic group
1 F WSMW/SIDU A 1
2 F WSMW/SIDU A 1
3 M MSMW/IDU A 1
4‡ M MSW A ND
5 M MSM B 2
6‡ M MSM B ND
7‡ M MSM B ND
8‡ M MSM B ND
9 M MSM B 2
10§ M MSM B ND
11 M MSM B 2
12‡ M MSM B ND
13 M MSM B 2
14 F WSM A 1
15 M MSM B 2
16¶ M MSM ND 1

*ID, identification; WSMW, women who have sex with men and women; SIDU, sex with injection drug users; MSMW, men who have sex with men and women; IDU, injection drug user; MSW, men who have sex with women; ND, not determined; MSM, men who have sex with men; WSM, women who have sex with men.
†Cluster A associated with injection drug use; cluster B associated with MSM.
‡HIV-1 sequence was not available for molecular analysis.
§HIV-1 sequence was similar to controls but not to sequences from either cluster A or B.
¶Case with no epidemiologic link to cluster A or cluster B.

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